Richard Williamson, MD
Neurological Surgery · Chandler, AZNPI 1609040609
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (43.0%), consulting fees and travel and lodging — rather than concentrated in one kind of arrangement. 19 manufacturers reported payments, led by Medical Device Business Services, Inc. at 35.4% of the total. Reporting peaked in 2024 at $8,293 and has fallen 71.7% since, to $2,349 in 2025.
Across 154 payments — averaging $145.17 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medical Device Business Services, Inc.$8K
- Synaptive Medical Inc.$4K
- Stryker$3K
- Penumbra, Inc.$2K
- Johnson & Johnson$2K
- Medtronic$975
- plus $3K from 13 others
Across 86 payments — averaging $1732.22 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Medical Device Business Services, Inc.$125K
- Penumbra, Inc.$24K
What the payments were for
- Consulting fees$9,00040%
- Travel & lodging$3,73217%
- Food & beverage$9,60443%
- Education$200%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Medical Device Business Services, Inc. | 16 | $7,913 |
| Synaptive Medical Inc. | 3 | $4,345 |
| Stryker | 29 | $2,705 |
| Penumbra, Inc. | 37 | $2,145 |
| Johnson & Johnson | 20 | $1,567 |
| Medtronic(2 entities) | 14 | $975 |
| Corindus Inc. | 5 | $640 |
| Siemens Medical Solutions USA, Inc. | 7 | $531 |
| Microvention, Inc. | 7 | $419 |
| Balt USA, LLC | 2 | $244 |
| Viz.ai, Inc. | 1 | $198 |
| Aesculap, Inc. | 6 | $181 |
| Terumo Medical Corporation | 1 | $149 |
| Smith+Nephew | 1 | $137 |
| Carl Zeiss Meditec, Inc. | 1 | $98 |
| Qapel Medical Inc | 1 | $58 |
| Route 92 Medical, Inc. | 1 | $27 |
| CSL Behring | 1 | $20 |
| GT Medical Technologies, Inc | 1 | $5 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- EMBOGUARD$6,000
- Brightmatter Guide V$4,345
- Penumbra System$954
- CorPath GRX$503
- SPOTLIGHT$500
- NEURO$495
- SURPASS$359
- CEREPAK UNIFORM$302
- Pipeline$300
- CorPath Imaging System$271
- TARGET$258
- SERRATO$246
- N/A$237
- Viz.AI LVO$198
- UNIVERSAL NEURO 3$169
- Solitaire$166
- Artemis$166
- SPINEMAP$165
- Smart Coil$165
- Benchmark$156
How this compares
$22,356 in reported general payments places this provider in the 70th percentile of 173 neurological surgery providers in Arizona.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| BrilintaTicagrelor | 12 | $5,328 |
| Gabapentin | 23 | $331 |
| ClopidogrelClopidogrel Bisulfate | 62 | $283 |
| Methocarbamol | 11 | $53 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Chandler
- Steve ChangChandler$1.1M
- Taro KaibaraChandler$60K
- Robert SpetzlerPhoenix$12.8M
- Juan UribePhoenix$6.7M
- Stephen PapadopoulosPhoenix$6M
- Volker SonntagPhoenix$2M
- Richard ChuaTucson$1.3M
- Jay TurnerPhoenix$1.2M
- Frederick MarcianoScottsdale$809K
- Michael LawtonPhoenix$761K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.